28349299008 has 168 divisors, whose sum is σ = 86830646760. Its totient is φ = 8811970560.

The previous prime is 28349299007. The next prime is 28349299021. The reversal of 28349299008 is 80099294382.

It is a happy number.

28349299008 is a `hidden beast` number, since 2 + 8 + 349 + 299 + 0 + 0 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15803506944 + 12545792064 = 125712^2 + 112008^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28349299001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1054048 + ... + 1080608.

Almost surely, 2^28349299008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28349299008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43415323380).

28349299008 is an abundant number, since it is smaller than the sum of its proper divisors (58481347752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28349299008 is a wasteful number, since it uses less digits than its factorization.

28349299008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26705 (or 26692 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 28349299008 in words is "twenty-eight billion, three hundred forty-nine million, two hundred ninety-nine thousand, eight".